Keldysh field theory for driven open quantum systems

2015/12/31 by L M Sieberer, L. M. Sieberer, M Buchhold +3 · 542 citations
Physics and Astronomy · #Field (mathematics) #Mechanical and Optical Resonators #Observable #Open quantum system #Open system (computing) #Quantum #Quantum dynamics #Quantum field theory #Quantum many-body systems #Quantum optics #Quantum technology #Strong Light-Matter Interactions #cond-mat.quant-gas

paper · pdf · doi:10.1088/0034-4885/79/9/096001

published in Reports on Progress in Physics 79(9), 096001 (IOP Publishing) · 73 pages, 13 figures

openalex created_date 2016/06/24 · openalex publication_date 2016/08/02 · arxiv created 2016/08/04 · arxiv updated 2016/08/05 · openalex updated_date 2026/08/06

Abstract

Recent experimental developments in diverse areas-ranging from cold atomic gases to light-driven semiconductors to microcavity arrays-move systems into the focus which are located on the interface of quantum optics, many-body physics and statistical mechanics. They share in common that coherent and driven-dissipative quantum dynamics occur on an equal footing, creating genuine non-equilibrium scenarios without immediate counterpart in equilibrium condensed matter physics. This concerns both their non-thermal stationary states and their many-body time evolution. It is a challenge to theory to identify novel instances of universal emergent macroscopic phenomena, which are tied unambiguously and in an observable way to the microscopic drive conditions. In this review, we discuss some recent results in this direction. Moreover, we provide a systematic introduction to the open system Keldysh functional integral approach, which is the proper technical tool to accomplish a merger of quantum optics and many-body physics, and leverages the power of modern quantum field theory to driven open quantum systems.

Citations

• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
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• Statistical-Mechanical Theory of Irreversible Processes. I. General Theory and Simple Applications to Magnetic and Conduction Problems
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Related

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